LC Guidelines: Tracings and References - General Information - 4XX Fields
NACO:
Subfield Codes
Do not use subfield $i, $4, or subfield $w code r in 4XX fields.
$w - Control subfield in 4XX See From Tracing fields
____/0 Special relationship
Use code n (Not applicable) when a subsequent character position in subfield $w is coded. In other respects NACO participants should follow the guidelines in the LC usage section for this subfield.
____/1 Tracing use restriction
Use code n (Not applicable) when a subsequent character position in subfield $w is coded. In other respects NACO participants should follow the guidelines in the LC usage section for this subfield.
____/2 Earlier form of heading
Use code n (Not applicable) when neither code a nor code e applies and a subsequent character position in subfield $w is coded. In other respects NACO participants should follow the guidelines in the LC usage section for this subfield.
____/3 Reference display
Code n (Not applicable) allows the generation of a cross reference display and need not be coded in subfield $w/3. In other respects NACO participants should follow the guidelines in the LC usage section for this subfield.
SACO:
SACO participants should follow the LC Subject usage guidelines that follow.
LC:
Subfield Codes
Do not use subfield $i, subfield $4, or subfield $w code r in 4XX fields.
NAMES/SERIES:
$w - Control subfield in 4XX See From Tracing fields
____/0 Special relationship
Do not use the following codes:
a - Earlier heading |
g - Broader term |
b - Later heading |
h - Narrower term |
d - Acronym |
i - Reference instruction phrase in subfield $i |
f - Musical composition |
r - Relationship designation in $i or $4 |
|
t - Immediate parent body |
Code d may occur in LC records created before 1981.
____/1 Tracing use restriction
Do not use the following codes:
a - Name reference structure only |
e - Name and series reference structures |
b - Subject reference structure only |
f - Subject and series reference structures |
c - Series reference structure only |
g - Name, subject, and series reference structures |
d - Name and subject reference structures |
|
____/2 Earlier form of heading
Do not use the following code: o - Earlier established form of heading (other authority file)
Use code a (Pre-AACR 2 form of heading (national name authority file)) when the tracing is for a linking reference from a pre-AACR 2 heading.
Use code e (Earlier established form of heading (national authority file)) in the LC/NAF primarily when a reference from the former heading is appropriate under normal AACR 2 reference practice, and the former heading is not covered by code a. This includes former headings where code c (AACR 2) or code d (Non-AACR 2 form used with AACR 2) were used. Do not automatically make a reference from the former heading in order to supply code e.
The following obsolete codes may appear in LC records created before the adoption of AACR 2 in January 1981 until these records have been evaluated (008/29, Reference evaluation is changed to code a) and the authority record updated.
b - AACR 1 [OBSOLETE]
c - AACR 2 [OBSOLETE]
d - Non-AACR 2 form used with AACR 2 [OBSOLETE]
____/3 Reference display
Do not use the following codes:
b - Reference not displayed, field 664 used
c - Reference not displayed, field 663 used
d - Reference not displayed, field 665 used
LC has not actively supplied field 664 or 665 since the 1980's; if these fields or code b or d are found in 4XXs, upgrade the NAR to the current practice. Use code a (Reference not displayed) when appropriate for suppressing a cross reference display.
SUBJECTS:
Subfield Codes
$w - Control subfield in 4XX See From Tracing fields
____/0 Special relationship
Use code n (Not applicable) in this position.
____/1 Tracing use restriction
Use code n (Not applicable) in this position.
____/2 Earlier form of heading
Use code e (Earlier established form of heading (national authority file), or code n (Not applicable) in this position.
____/3 Reference display
Use code n (Not applicable) in this position.
For more information on LC Guidelines, select:
See also: